Drill.



' PATENTED OCT. 23,1905.

J. MURPHY. DRILL. LPPLIOATIOI III ED D30. 22, 1995.

wad/w,

UNITED STATES PATENT .CARNAHAl l, OF DENVER, COLORADO.

DRlLL.

:.l all whom it mag concern;

Be it known that I, JEREMIAH MURPHY, a citizen of the United States, residing at Den-- yer, in the county of Denver and State of Colorado, have. invented new and useful Imrovements in Drills, of Which the following is a specification. I

.This invention relates to percussive drills generally employed for drilling and boring when mining, and aims to provide a drill of such class with means hereinafter more spe cifically referred to for moving or loosening the tool from the wall of the bore in case the tool should become fast or stick, and, furthermore, said means is adapted duringthe operation of the drill to always position the shank of the toolin one end of the cylinder or bodyportion of thedrill, so that the hammer of the drill will always strike the end of the shank of the tool, thereby preventing the hammer striking-against the tool-holder or bushing, so

'view the invention consists in the novel con,

- struction, combination, and arrangement of parts hereinafter. more specifically described, illustrated in the accompanying drawings,

.which form a part of this specification, and

wherein is shown the preferred embodiment of the invention; but it is to be understood thatchangges, variations, and'modifications may be resorted to which come within the scope of the claims hereunto appended.

ln'the drawings, wherein like reference characters denote corresponding parts throughout the several views, Figure 1 is a side elevation of a percussive drill, partly in section and showing, by way of example, the

means for removing or loosening the tool and for positioning the shank ofthe tool for the purpose set forth, Fig. 2 is a side elevation of the means for withdrawing or loosening the tool and for positioning the shank thereof. Fig. 3 a top plan, and Fig. 4 is a bottom plan, of said means.

Specification of Lettersfatent. Application filed December 22,1905. Serial No. 293.005.

Patented Oct. 23, 1906.

Referring "to the drawings by reference characters, 1 denotes the cylinder of the drill 2, the cap for one end thereof; 3, the cap for the other end thereof, 4, the tool-holder or bushing; 5, the tool';'6, the shoulder formed on the tool, and 7 the shank of the tool, which is ada ted to receive the blows of the hammer o the drilland which is of such length as to normally extend above the tool-holder or bushing 4.

The means for withdrawing the tool from the bore or for loosening the tool within the bore and also for positioning'the shank of the tool so that said shank will always receive the blows of the hammer of a drill comprises what may be termed a cylinder-receiving member and a, tool-receiving member, con, nected by a plurality of distensible and, contractiblesprings, to be hereinafter referred to. The cylinder-receiving member consists of a collar formed of two sections 8 9, having their ends overlapped, and the said sections 8 9 are pivoted together, as at 10, and are also connected together through the medium of the removable pin 11, engaging in suitable alining openings formed in the sections 8 9, and thesaid pin 11 is carried by a shiftable spring-arm 12, which is swiveled, as at 13, to the section 9. The pin 11 is carried by the arm 12 at a point removed from its free end, and said arm 12 is so constructed as to form a handle portion 14. The sections 8 9 are formed with diametrically opposite apertured ears 15 16, and each of said sections is further provided with an opening 17,, arranged in alinementwith the opening in its respective ear. The cylinder-receiving memher is adapted to clamp around the cylinder 1 in close proximity to the top edge of the cap 3, and the opening in the said member is of such diameter that when .the member clamps the cylinder it will be in an unusually snug manner. as before stated, are connected together through the medium of the pin 11, and by shifting the arm 12 the pin 11 will be elevated so as to pass out of the section 8, and the sections can then be swung open and removed from the cylinder 1. The tool-receiving member consists of a collar formed of two sections 1819, which have their ends overlapped and are pivotally connected together,

as at 20. The said sections18 .19 are also detachably connected through the medium of The sections 8 9 of said member,

; through is a, removable pin21, which extends in alin- -1ng openings formed in the said sections. and the said pin 21 is carried by -a shiftable spring-arm 22, which is swivelly connected with the section 19, asat 21. The sections 18 19 are provided with a pair of laterallyextending ears 24, which are arranged diametrically opposite with .respect to each other, and each of the said ears 24 is pro-, VldQd "Wll'/h. & pair of openings 25. The inner face ofeach of the sections 1819 is cut away so as to form-an opening 26 to receive the shoulder 6 and to also. provide an opening 27,

' throughwhich extends the tool 5,said opening 27 ,being of; less diameter; than the opening 26. The tool-receiving memberis so constructed that when it surrounds the'tool it will tightly clamp the same. 'The'distensible and contractible springs are indicated by the reference characters 28 29,, and said springs are closely coiled and each of said s rings at one. end extends'up and throught e openings 17?,formedgin. the ears-of the cylinderreceiving member, and down and through the openings 17 and then bent at an-angle' to engage the inner face of. the cylinder-receiving member, so as. tofixedly connect the ,upper endsof the springs thereto. Byxthis arrangement the springs'28 29 are fixedly connected ,to the cylinder-receiving member.

.The other end of each of the springs extends inand through the outer opening of the pair; of openings25 of the ears 24 and then up and, e inner opening of the air of open-; ings 25- and thenbent toengage t e inner face; .of the apertured ears, so as to fixedly connectf thelower ends of the springs thereto. By such an arrangement the springs 28 29 are fixedly connected to the tool-receiving member. The function of the springs 28 29 is to withdraw or loosen the tool in case the same should become'fast or stick in the bore, and said springs 28 29 also act as a means for withdrawing the. tool so as to retain the shank thereof above the tool-holder or bushing 4, so that the shank of the tool Willreceive the blows of the hammer.

The manner in which the means operates in case the tool becomes fast or sticks in the bore is as follows: The motivefluid is turned on partly, so as to allow the hammer to hit a light blow and at the same time the operator canpull back with the cylinder. The light I blows of; the hammer will tend to' loosen the tool,, the .springs w-illassist to withdraw the tool, and owing to the action of pulling back of. the cylinder by the operator the tool will .be withdrawn. 'During the operation of the drill the hammer as it strikes the tool will force the tool forward. Atthe same time,

owing to the. position of the shoulder 6, when 1 thebore moves forward the-tool-receiving member will be carried with the tool, thereby distending the springs 28 29. When the hammermoves in an opposite direction, the springs 2829 will come into play, or, in other words, contract, and this action will cause the tool-receiving member to move toward 1 the cylinder and carry the tool therewith and atthe same time move. the shank-of the tool in the path of the hammer. It will be evident when the drill becomes stuck and loosened in a manner as hercinbefore set forth it can be readily and quickly caused to resume its operative position, and also, owing to the manner in which the tool is connected with the cylinder, the entire'drill can be conveniently laid aside Without possibility ofthe toolseparatingfrom the drill, overcoming the necessity of holding the tool when removing the drill and replacing -the tool in the drill-body when it is desired to use the drill.

Having thus fufly described the invention, what I claim as new, and desire to secure by Letters Patent, is-

g 1. Means for withdrawing a tool "fromn bore, consisting of a stationary and a'movable clamping element, each consisting of a pair of sections hinged together at one end and a spring member carrying means detachably engaging with the sections'for connecting the other ends together, combined with-a plurality of spring elements having thein upper ends fixed to the stationary element and their'lower ends fixed to the movable element having an opening an'd'said movable element having an opening, the opening through the movable element having one portion of greater diameter than the other portion, combined with a plurality of spring elements having the upper ends thereof extending through and fixed to the stationary element and their lower ends extending through and fixed to the'm'ovahle element.

3. Means for withdrawing a tool from a bore, consisting of a stationary and a movable clamping element, each of said elements consisting of two sections, each pair of sections hinged together at one end and havin" their other ends overlapping each other, an a spring clamping member carrying means for detachably connecting the overlapping ends of each air of sections, combined with a plurality of spring elements having upper and lower projecting ends, the upper projecting ends of said spring elements fixedly se cured to said stationary member-and the lower. projecting ends to said spring elements fixedly secured to said movable element.

4-. Means for withdrawing a tool from a 5 ment provided. with a pair of diametrically v ings through the ears,

opposite apertured ears and further provided with openings in aline'ment with the openand said movable element provided with a pair of ears each havin a pair of openings, combined with splura ity of spring elements having upper and lower projecting ends, said upper projecting ends of said spring elements extending up through the apertures 1n the ears of the, sta

Vtionery element and down through the 0 enings in sand stationary element and then ent at right angles to abut against the stationary element, thereby fixedly connecting the 11p-- per projecting ends of said spring elements to the stationer y'- element, said lower pro ecting ends of sa d. spring elements extending down through. one of the apertures of the ears of said movable element enrhthenup through the other apertures of the ears of seid'movable element and then bent at right angles to abut against the ears of the movable element,

thereby fixedly connecting the lower projectin ends of the spring elements to the mov ab e element.

5; Means for withdrawing a tool from a. bore, consisting of estationery and e-movable clamping element, each provided with an va e opening, the opening through the mo element having one portion of greater diameter than the other ortion, each, of said elements provided wit 1 a pair of apertured ears,

combinedwith a plurality of spring elements JEREMIAH MURPHYQ r Witnesses: C. T. CARNAIHAN,

I ANNA RosENBAUM. 

